Privilege Escalation in github.com/projectcapsule/capsule (CVE-2026-65835)
Summary
Vulnerability in github.com/projectcapsule/capsule (CVE-2026-65835). Risk of unauthorized operations or information disclosure. Exploitable via ClusterRole. Mitigation: upgrade to 0.13.8 or later.
Original description
The description as published by the source.
Summary
CVE-2026-22872 (GHSA-qjjm-7j9w-pw72) reported that a Tenant Owner could create cluster-scoped resources
(e.g. ClusterRole, ValidatingWebhookConfiguration) through a TenantResource, because the controller
applies them with its cluster-admin ServiceAccount and SetNamespace is ineffective for cluster-scoped
kinds. The v0.13.0 fix added a cluster-scope rejection guard, but only on the NamespacedItems selection
path (ResourceReference.LoadResources -> IsNamespacedGVK, error "cluster-scoped kind ... is not allowed"). The RawItems create path — the exact vector the original advisory named — and the Generators
path were not given this guard. The vulnerability therefore persists in all releases v0.13.0 through
v0.13.7 and on trunk HEAD (8d89d6865d).
Details
TenantResource reconcile flow:
internal/controllers/resources/namespaced.goreconcile()obtains the apply client vialoadClient();
by default (impersonation off, noSpec.ServiceAccount) this is the manager client whose SA is bound to
cluster-admin (charts/capsule/templates/rbac.yaml:488-501,{fullname}-manager-rolebinding->
roleRef cluster-admin).Collector.Collect()(collect.go) processesspec.RawItemsviahandleRawItemandspec.Generators
viahandleGeneratorItem.
handleRawItem (collect.go:406-425, trunk HEAD — byte-identical to v0.13.0):
tmplString := tpl.FastTemplate(string(item.Raw), opts.Iterator.FastContext)
obj := &unstructured.Unstr…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-65835 has been found in github.com/projectcapsule/capsule.
Attackers can target a specific entry point like ClusterRole over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.6/10.
What to do: upgrade github.com/projectcapsule/capsule to 0.13.8 or later.
If unsure, ask your IT team or search "github.com/projectcapsule/capsule CVE-2026-65835" on the vendor's site.
CVE-2026-65835 (github.com/projectcapsule/capsule) — CWE-269 / CVSS v3 6.6
Attack vector: remote (network-reachable) / no user interaction
Attack surface: ClusterRole / ValidatingWebhookConfiguration / TenantResource / SetNamespace
Patched: 0.13.8 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-269) exists in github.com/projectcapsule/capsule. Attackers reach the vulnerable code path via ClusterRole.
Check the vendor advisory for the affected versions of github.com/projectcapsule/capsule. Attack surface: ClusterRole / ValidatingWebhookConfiguration / TenantResource / SetNamespace.
Severity: Medium (CVSS 6.6/10). Risk of unauthorized operations or information disclosure.
Update to 0.13.8.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/projectcapsule/capsule' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/projectcapsule/capsule' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/projectcapsule/capsuleを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/projectcapsule/capsule to 0.13.8ステージング環境で 0.13.8 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com